National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

84°F

29°C

Humidity 77%
Wind Speed S 14 mph
Barometer 29.95 in (1013.2 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 29 Jul 9:56 am CDT
Extended Forecast for

Lockhart TX

  • Today

    Today: Partly sunny, then gradually becoming sunny and hot, with a high near 100. Heat index values as high as 107. South southwest wind around 10 mph.

    High: 100 °F

    Hot

  • Tonight

    Tonight: Increasing clouds, with a low around 76. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly cloudy through mid morning, then gradual clearing and hot, with a high near 100. Heat index values as high as 105. South wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 75. South wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 75 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 103. South southwest wind around 5 mph.

    High: 103 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 77. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 77 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 102. Southwest wind around 5 mph.

    High: 102 °F

    Hot

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 78. Southeast wind around 5 mph becoming southwest after midnight.

    Low: 78 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 101. West southwest wind around 5 mph becoming north northeast in the afternoon.

    High: 101 °F

    Hot

Detailed Forecast

Today
Partly sunny, then gradually becoming sunny and hot, with a high near 100. Heat index values as high as 107. South southwest wind around 10 mph.
Tonight
Increasing clouds, with a low around 76. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday
Mostly cloudy through mid morning, then gradual clearing and hot, with a high near 100. Heat index values as high as 105. South wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 75. South wind 5 to 15 mph, with gusts as high as 20 mph.
Friday
Sunny and hot, with a high near 103. South southwest wind around 5 mph.
Friday Night
Mostly clear, with a low around 77. South wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday
Mostly sunny and hot, with a high near 102. Southwest wind around 5 mph.
Saturday Night
Partly cloudy, with a low around 78. Southeast wind around 5 mph becoming southwest after midnight.
Sunday
Mostly sunny and hot, with a high near 101. West southwest wind around 5 mph becoming north northeast in the afternoon.
Sunday Night
Mostly clear, with a low around 77.
Monday
Sunny and hot, with a high near 102.
Monday Night
Mostly clear, with a low around 77.
Tuesday
Mostly sunny and hot, with a high near 101.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lockhart TX
 29.88°N 97.68°W (Elev. 525 ft)
Last Update:
6:42 am CDT Jul 29, 2026
Forecast Valid:
10am CDT Jul 29, 2026-6pm CDT Aug 4, 2026
 
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Additional Resources

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